Machine for drying liquids.



A. GLIDIE.

MACHINE FOR DRYING LIQUIDS.

APPLICATION FILED NOV. 10. WW.

Patented May 6, 1919.

ill) UNITED STATES ATENT OFFICE.

ALBERT GLIDIE, E HAIIoiIBoL, WARIILAND, SWEDEN, ASSIGNOB, DY DIREcT ANDMESNE ASSIGNMENTS, To DRYING rRoDUcTs co. LTD. A/S., or CHRISTIANIA,

NORWAY.

MACHINE FOB DRYING LIQUIDS.

Specification of Letters Patent.

, Application filed November 10, 1917. Serial No. 201,278; I

To all whom it may concern:

Be it known that I, ALBERT GLIDIE, a subject of the King of Norway,residing at Hakonbol, Wiirniland, Sweden, have invented certain new anduseful Improvements in Machines for Drying-Liquids; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

The present invention has for its object a machine for drying liquids ofthe kind in which the liquid is dried on the surface of a rotating body,the interior of which is heated by means of steam, hot air or the like.

In accordance with the invention the drying takes place on the planeupper surface of a hollow annular body rotating on a vertical axis, andthe upper side of which is inclosed in an annular hood, which formstogether with the plane drying surface a closed channel through whichpasses a stream of hot dry air. The liquid to be dried is fed to thesurface in the usual manner by means of a stationary hopper, the openlower end of which is placed at such a distance from the surface, that asuitable layer of liquid is transferred to the surface during itspassage below the hopper. Immediately in front of the hopper is placed astationary scraper for removing the dried product.

0n the drawings:

Figure 1 is an axial section through a form of the invention.

Fig. 2 is a side view and Fig. 3 a plan of the machine.

' The hollow annular body 1 with the horizontal drying surface 2 isfastened by means of spider 3 to a rotating vertical shaft 4:. Throughthis shaft heating medium is supplied by means of a channel 5 and tube 6and let out by means of inlet tube 7 and channel 8.

Over the largest part of its circumference the annular body 1 is coveredby a stationary annular hood 9, which incloses tightly the sides of.theannular body. Between the upper side 2 of annular body 1 and hood 9 isformed an annular channel 10.

On its underside the body 1 is inclosed in a vessel 11 and a top-plate12 covers the central opening of hood 9. The liquid to be dried is fed.to the surface 2 from a hopper 13, the bottom of which is located atsuch a distance from surface 2 that a suitable layer of liquid istransferred to the surface during the passage of the same below the hop-Immediately after its passage under the hopper the surface enterschannel and the drying process begins. In front of hopper 13 is locateda scraper 14: for removing the drying product from the surface after thesame has passed the whole of the drying channel. The air in vessel 11 isheated by means of the annular body 1 and is sucked through tube 15 intoannular channel 10 near the outlet end of the same, and from this pointthe air is sucked through the channel by means of exhaust tube 16,whichis connected to an evacuator or the like, not shown on the drawing.

By the apparatus above described the heat of the drying medium isutilized in the best possible manner by having the hollow dry ing bodycompletely inclosed in a vessel so that the heat radiating from thedrying body may be utilized for heating the air in said vessel andfinally for drying the liquid placed on the drying surface of the hollowdrying body.

he drying apparatus above described is particularly adapted for thedryin of fluids such as milk and the like, the c lrying of which maytake place in one single operation without any preheating.

However the feeding hopper 13 may also be utilized as a preheating tank,part of the liquid evaporating in the same. In the latter case the feedmhopper is formed as a closed tank and su jected to vacuum being at thesame time provided with a suitable stirring apparatus.

I claim:

1. A machine for dryin liquids, comprising a hollow annular b yrotatable on a vertical axis, means for supplying a heating medium tothe interior of said body, a vessel inclosing said body and heated bythe latter, means to supply heated air from the vessel to the interiorof sai body means to supply liquid to be dried Said body, and

means to draw the heated air through the body in a direction opposite tothe direction of movement of the latter.

2. A machine for drying liquids comprising an annular channel rotatableon a vertical axis, a drying late in the channel, means for supplying aeating medium between the plate and the bottom of the channel, a vesselinclosing the channel and heated by the latter, means to conduct heatedair from the vessel to the channel, and means to feed liquid to be driedonto the plate.

3. A machine for drying li uids comprisin an annular channel rotata leon a vertica axis, a dryin plate in the channel, means for supplying aeating medium between the plate and the bottom of the channel, a vesselinclosing the channel and'heated by the latter, means to conduct heatedair from the vessel to the channel above the drying plate, and means tofeed liquid to be dried onto the plate.

4:. A machine for drying liquids comprising a stationary vessel, anannular heated channel rotatable therein, a stationary cover common tosaid vessel and channel and having a feed and discharge opening at onepoint, said vessel acting as a heater for air, a hot air connectionbetween said vessel and channel near the discharge side of said opening,and an air discharge. from the feed side of said opening, whereby heatedair from the vessel w1ll be caused to flow around said annular channelcounter to the direction of movement of the material.

5. A machine for drying liquids comprising a stationary vessel, anannular channel mounted to rotate therein on a vertical axle,

an annular rotatable drying plate mounted on one side of the hopper anda heat exhaust conduit communicating with the channel above the plate onthe other side of the hopper.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

ALBERT GLIDIE.

lVitnesses:

C. NARMAN, C. FABRICIUS HANSEN.

